Xi-Cheng Zhang
— J. Erik Jonsson '22 Professor of Science
— Professor, Physics, Applied Physics, and Astronomy
— Professor, Electrical, Computer & System Engineering,
Rensselaer Polytechnic Institute

— B.S., Physics, Peking University, Beijing, China, 1982
— M.S., Physics, Brown University, 1983
— Ph.D., Physics, Brown University, 1986

Career Highlights:
J. Erick Zhang has received six patents, ten patents pending and numerous awards including the National Science Foundation's CAREER award, Research Corporation's Cottrell Award, and China's Outstanding Scholar Award. He is a Fellow of IEEE, the Optical Society of America, and was elected a Fellow of the American Physics Society in 2002. He joined RPI in 1992 and has held teaching positions at Xiamen University, the Chinese Academy of Science and the Shanghai University of Science and Technology.

Research Areas:

  • Terahertz Optics Sensing
  • Terahertz Optics Imaging

Terahertz Optics Sensing
Zhang's work with time-domain THz spectroscopy systems holds promise for diagnostics of materials such as semiconductors and biomolecules. THz time-domain spectroscopy uses short pulses of broadband THz radiation, typically generated using ultrafast laser pulses. The transmitted THz electric field is measured coherently, which provides both high sensitivity and time-resolved phase information.

Terahertz Optics Imaging
Zhang's interest in THz wave imaging is a result of the availability of phase-sensitive spectroscopic images. These images, called "functional images," are ideal for dry dielectric substances including paper, plastics, and ceramics. Zhang's research centers on two-dimensional THz wave imaging through free-space electro-optic detection and on THz ray, or T-ray, imaging for probing the dielectric properties of three-dimensional structures.

Select Publications
X.-C. Zhang, "Terahertz Wave Imaging: Horizons and Hurdles," Physics in Medicine and Biology, 47, 1 (2002).

B. Ferguson, X.-C. Zhang, "Materials for Terahertz Science and Technology," Review Article Nature Materials, 1, 26 (2002).

X.-C. Zhang, Q. Chen, "Terahertz Wave Imaging and its Applications," in Ultrafast Lasers: Technology and Applications, New York, NY, Marcel Dekker, Inc., 521-572 (2002).

J. Xu, X.-C. Zhang, "Optical Rectification in an Area with a Diameter Comparable to or Smaller than the Center Wavelength of Terahertz Radiation," Optics Letters 27, 1067 (2002).

R. J. Blaikie, D. R. S. Cumming, S. M. Durbin, E. D. Walsby, S. Wang, T. Yuan, J. Xu, X.-C. Zhang, "Characterization of T-ray Binary Lenses," Optics Letters, 27, 1312 (2002).

D. Abbott, B. Ferguson, D. Gray, S. Wang, , X.-C. Zhang, "T-ray Computed Tomography," Optics Letters 27, 1312 (2002).

P. M. Ajayan, Y.-C. Chen, T.- M. Lu, N. R. Raravikar, L. S. Schadler, G.-C. Wang, X.-C. Zhang, Y.-P. Zhao, "Ultrafast Optical Switch Properties of Single-wall Carbon Nanotube Polymer Composites at 1.55 µm," Appl. Phys. Letts. 81, 975 (2002).

B. Ferguson, X.-C. Zhang, "Computed Tomography Adds Third Dimension to Terahertz Imaging," Laser Focus World, May issue, 133 (2002).

D. Abbott, S. Mickan, J. Munch, X.-C. Zhang, "Noise Reduction in Terahertz Thin Film Measurement Using Double Modulated Differential Technique," Fluctuation and Noise Letters 2, R13-R28 (2002).

Q. Chen, Z. Jiang, X.-C. Zhang, "Two-dimensional Terahertz Wave Imaging," in Terahertz Sources and Systems, Kluwer Academic Publisher, 225-239 (2001).

Contact Information:
Xi-Cheng Zhang
Professor, Department of Physics, Applied Physics and Astronomy
Professor, Department of Electrical, Computer and System Engineering
Erik Jonsson Chair Professor of Science
Rensselaer Polytechnic Institute
110 Eighth Street
Troy, N.Y. 12180 USA
(518) 276-3079

E-mail: zhangxc@rpi.edu


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